[Letter from D. W. Kempner to Albertine Yeager, June 26, 1956], letter, June 26, 1956; (https://texashistory.unt.edu/ark:/67531/metapth1420353/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .